Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal processing for controlling recording light...
Reexamination Certificate
2003-12-23
2008-08-26
Feild, Joseph (Department: 2627)
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal processing for controlling recording light...
Reexamination Certificate
active
07417932
ABSTRACT:
An apparatus and method for driving a laser diode for a recording of data. According to the method, pre-stored variables corresponding to respective manufacturers and respective recording pits of the optical disk are checked. A main pulse based on the checked variables and a sub pulse having a prescribed width are generated. The sub pulse is generated at a prescribed time prior to generating the main pulse. A driving signal for driving a LD to record data is generated upon receiving the main pulse and the sub pulse. Therefore, data recording operations are performed using the driving signal without overpower as in the conventional Mode 1 (e.g., Orange 1), that can take less computation and less time to form recording pits at a desired time/size for a recording period of time as in the conventional Mode 2 (e.g., Orange 2), which can result in improve recording quality.
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Feild Joseph
Haley Joseph
Hitachi-LG Data Storage Korea Inc.
Ked & Associates LLP
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